#include <iostream>
#include <unistd.h>
#include <string>
#include <cstring>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "Log.hpp"

using namespace log_ns;

//./client 192.168.184.129 8888
int main(int argc, char *argv[])
{
    if (argc != 3)
    {
        std::cerr << "Usage " << argv[0] << " Server-ip Server-port" << std::endl;
        exit(0);
    }

    std::string server_ip = argv[1];
    uint16_t server_port = std::stoi(argv[2]);

    int sockfd = ::socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0)
    {
        LOG(FATAL, "socket error\n");
        exit(1);
    }
    LOG(DEBUG, "socket create success, sockfd:%d\n", sockfd);

    struct sockaddr_in server;
    memset(&server, 0, sizeof(server));
    server.sin_family = AF_INET;
    server.sin_port = htons(server_port);
    server.sin_addr.s_addr = inet_addr(server_ip.c_str());

    // client的端口号一般由client的OS随机选择
    // client不需要“显示”地绑定IP和端口号，当client第一次给服务器发消息时OS会自动绑定IP和端口号
    while (true)
    {
        std::string msg;
        std::getline(std::cin, msg);
        int n = sendto(sockfd, msg.c_str(), msg.size(), 0, (struct sockaddr *)&server, sizeof(server));
        if (n > 0)
        {
            struct sockaddr_in temp;
            socklen_t len = sizeof(temp);
            char buff[1024];
            int m = recvfrom(sockfd, buff, sizeof(buff) - 1, 0, (struct sockaddr *)&temp, &len);
            if (m > 0)
            {
                buff[m] = 0;
                std::cout << buff << std::endl;
            }
            else
            {
                break;
            }
        }
    }

    ::close(sockfd);
    return 0;
}